when applying 1:M data blending to fulfill business requirements, the command buttons within the hover tooltip do not appear. Does anybody have an explanation as to why this occurs and whether there is a way around this? Attached is an example with superstore / worldbank data. It's somewhat artificial, but it still shows what is happening.

Can't answer about the server. We don't have 8.2 server here yet. I just have 8.1 and 8.2 desktop installed on my own machine. When I opened your example, I just happened to do 8.2 first. Had I started with 8.1, I probably wouldn't even have considered trying 8.2. Just one of those serendipity things.